Method of forming vehicle wheel rim members



Oct. 6,1931. w. N. BOOTH 1,826,449

METHOD OF FORMING VEHICLE WHEEL RIM MEMBERS Filed April 25. 1928 4 sheets-sheet 1 Oct. 6, 1931. rw, N- BOOTH l 1,826,449

METHOD OF FORMING VEHICLE WHEEL RIM MEMBERS Filed April 23. 1928 4 Sheets-Sheet 2 Oct. 6,v 1931. w. N. BOOTH 1,826,449

METHOD OF FORMING 'VEHICLE WHEEL RIM MEMBERS Filed April 23. 192B 4 Sheets-Sheet 3 ""l Ill w. N. BOOTH 1,826,449

METHOD OF FORMING VEHICLE WHEEL RIM MEMBERS Uct. 6,

Filed Apr'il 2:5.

1928 4 Sheets-Sheet 4 Streuung/0 Y WILLIAM N. 1=iorr1r,"`orv DETROIT, iuionreemnssenon To inLsEY-HAYES WHEEL,

Patented oct., 6, 1,7931

hier erica CORPORATION, OF DETROT, IVIICEGAN, it. CORPOBATON OF NEW' YORK aiipiieatip sied April es,

' I The invention relatesto the manufacture oi vehicle'wheel rimmembers and refers more particularly tothe'manufacture of detach,-A able side rings for tire carrying rims of the ."solid base type. Side rings have heretofore beenjmade 'roin individual strips ofjstock, each having a lengthapproximately equal to that ofthe side ringfinade therefrom. v Each Vstripfof vstock fwas'formed vintoY an annulus l by Vsuitable means such as aV forming roll ma# Chine and as a result had lflats at its ends which were removed either bysevering the saine orby a number of ex] aensireforining operations, either of which greatly increasedV l the cost of manufacture ot' Vthe side ring.

'It is' an object of my'` invention to reduce Vthe costof manufacture of the side ring; Another object is'to accurately form the side ring and make thev same vcircularly true.

' 20 vWith these as wellA as rother objects in view,

the invention resides in the novel Jfeatures as l A nore fully hereinafter set forth.

In the drawings: z Figure 1 is a side elevation oi a portion or a lforiningroll machine and showing the l line of Figure.

i i 12 ofiFigure 11;

manner of carrying out the irst stepof the methodfembodying my invention; f

yFigure 2 is across section on the line 2 2 of Figurel;

at l'Figure 3 is a planview of a'sevvering ma y chine and showing the manner of carrying out the next steps in the method', y f Y Figure t is a sectional sideelevation taken on the line 4 4 of Figure 3; i Y

Figure `5 is aplanview ofY a piercing machine andshowing the mannerof carrying outthe neXt steps in the method; f Figures 6, 7 8, 9 and l0-arecross sections, respectively, on the lines 6 6, 7 7, Y 8 8, 9 9 and 10-1Q`0'Figure 5; A y Figure 11 is a fplan view of a swaging lmachine and showing the mannerof carrying out thejnext step; e p ,a Figure 12 isa cross section on the line 12 Y Figureil is a .plan view of a portion' of 'l the completed rimmember; f'

Figure le isa sectional view taken on the Vfgflhe "apparatus illustratedherein Vforeariszs. serial No. 272,167.

ever, that the'apparatus shown herein is for-r the purpose of illustration only and that the following method is not limited to the use of such apparatus.

With my method, a strip of stock having a section corresponding to that of the sidev ring of a tire carrying rim of the solid base type and having a length suiiicient to produce a plurality of side rings is inserted between the forming rolls 1, 2 and 3 of a usual forming roll machine, such as a pyramid roll machine, shown in Figures 1 and 2. These rolls are arranged to bend the stock with a constant radius of curvature, as long as the stock is completely between the rolls. The stock, after passing between the rolls, is deflected out of the path of `the un'ormed stock by a suitable delector upon the machine, which compels the stock to assume a spiral form or more specifically a yhelical form. The extent to which the stock is deflected is preferably within the limits of elasticity of the stock. After the strip has been coiled it is then severed. However, before` severing the convo'lutions of the coiled strip, I size the same and further so position them that they are severed to accurate length. For carrying out these steps I may use the machine shown in 'Figures 3 and 4, in which is the holder or 9, which latter is actuated by a piston in the air cylinder 10. The holder is mounted upon the bolster plate of the machine so that it may be moved toward or away from the separating means G, which latter is in the nature holder toward the 'wedge-shaped member. This wedgesha-ped member raises the uppermostconvolution to a position to be-engaged by the 'jaws 8 of the sizing means, which latter are then actuated to size the uppermost convolution and to make the .same circularly true. `The holder with the'colled strip there- Voninay then bev rotated to a position to 'sever the uppermost endportion of the coiled strip bymea'ns ,of the` punch 1ll and die 12, the lat-'I ter 'being .stationary with the wedge-shaped member and the former being vertically movable ina direction parallel to the axes ofthe. holder and coiled strip. As shown in they y present instance-the ends of the convolutions forming. the side rings. are S-shaped 4and interlocking, each end having 'parallel portions..4 V13 and anintermediateor connecting return curved-'portion 114, the arrangement being KVsuch thatthe ends when together form cooperating interlocking ears and recesses. VAfter the'strip has been coiled, the holder with the Vcoiled' strip is rotated'gto engagethe,frelupyperffend thereof with a positioning finger l5 and the punch. l1 is again lowered for the purpose vspecified above; lln this connection it is to beVv noted that the-fingerl is actuated by 4a lcam 15 `'carried bythe plunger.V The arran'gemen'tjis such thatv when'the punch is initsuppermost position, the positioning fin- Viger isjf'orced inwardly by the cam toengage the uppermost endl of the coiled strip to position this end prior to severing?V the spaced and'sizedconvolution. During the downward movement of the puncl1,the cam 'operates'to vwitl'idraw the vpositioning finger, preferably fjust after thec'lamping andstripping block has engaged the separated .and sized Vconvolution1` and at the same ti'me'sufliciently inv advance of the punch'so as not'to interfere therewithf f l #"After the severing operation the holder 4t may be movedaway fromthe vwedge-shaped separating member and the'jaws 8 of the siz-l ing means retracted, whereupon the severed tionsiofV the coiled strip Vfrom theremaining lf convolutions, size 'these separated convolu? tions and; then fserver the, separatedV and sized Y.CenvQlhitions.. 'A "After -theconvolutions 'have beenV severed', J they-may thenbe'operate'dupon individually VVto.y form the completed side ring.y inthe present instance, Y.ea'chr convolution is operated upon by themachineshown 1n Figures 5, 6,

7, 8 andt), which has means for sizing and.

holding-'the severed convolutionscircular and `has apunch holder carrying a number of punches adaptedto cooperatewithcorrespending diesto pierce the several convolu- V tions; 'y The means yfor sizing and holding the severed convolutions l circular comprises rahas the punches 18 for piercing-the tire 'engaging portionflQ Vof the vseveredconvolution near its ends Vto form the openings 2O therein.. The punch holder also has the shearing punches2l'V for forming .the open ended op'envings 22nea`r the ends of the base portion 23 V.of the convolution; 'lhepunchholder further carriesthe piercing, punch V24 for forming the opening 25 knear one end ofthebase portion 23 of the convolution'. Y. vAfter these openings have been formed the convolution `is removed from` this A:inachineY `dially movable aws 17 ,which .operate in the y f same manner as the jaws 8'. The punch holder' and placed in the machineshown in Fi'tgu'resy i l0 and ll. rlliis'coiivolution is positioned by v this' opening.

`rlhe convolution this side' ring is circular andis as nearly ac- Y asnow completed'forms'k the side ring' shown Vparticularly .inf Figure l2 yandA by'reason of .the method employed,

means of the pin26i which engages in loneofr theopenended lopenings 22 and'is operatedv upon by the punchV 27 Ywhich. engages init-he openingv 2,5"and' swages the metalf'to enlarge curatelyformed lasV commercially possible soY that it may be highly finished and-present manufacture of the side ringy isV alsov effecteic;

sWhat I claiinas myinvention is: Y f yl. The method of forming ,afvehicle wheel rim member, which consists in forming with a Vconstant curvature-,stock having a section a neat andrple'asing appearance. `With .this method .a material decrees-ein the cost., of-

substantially of the completed rim member V and of length to produce-a -pluralityfof rim members, deflecting the formed stock out A`*of the path of the stock tobe formed andinto a helix, applying radial pressure tothe convolutions of the helical'stocl to size the same,V

and: 'severing the'f sized convolutions.V f

2. The method' of forming fa vehicle wheel rim-member, whichconsists in forming with a constant 'curvature' stock having a section,

substantially of the completed `riin'meinber .and ofa Vlength to producefa plurality of rim members, deiecting the formed Vstoclr'out of kthe path of the stoclrtobeformed and into a helix, separatingthe convolutions'ofy the helical stock, and severing the separated con-V .vorlutionsat predetermined Apoir'its 'Fand in a direction substantially parallelto thea'Xisf of the helical stock'. v V' 'i Y` 3. Themethodofj forming i .vehicle wheely rim member, which consists in formingwith a const'antcurvature stolsha'vjing asection sub-.7

stantiallyof thelcompleted rim member. ,andl of length j to Y produce Ya Aplurality I of rim .l

members, deiecting the formed stock out of thepath of the stock to be formed and into a helix, separating the convolutions of the helical stock, applying radial pressure to the separated convolutions t0 size the same, and

severing the separated and sized'convolutions ,l atpredeterniined points.

' 4. The method of forming a' vehicle Wheel rvriin member, Which consists in forming with a continuous arc stock having a section substantially of the completed rim member and al length to produce a plurality of rim ineinbers, deliecting the formed stock out of the di path of the stock to vbe formed'and into a helix, separating the convolutions of helical stock, applyingradial pressure to the separated convolutions, and shearing in a direction substantially parallel to the axis of the helical stoclrth-e sized' convolutions at predetermined'points.. 1 Y s 5. The'niethod of forming a vehicle Wheel rini member,- Whicli consists in forming .a

' coiled strip having a section substantially of 'a tire carrying riin,which consists in forini ing a coiled strip having a section substantially of the side ring-and a length to produce a plurality of side rings, axially separating successiveconvolutions of the coiled strip from the remaining convolutions, ap-

plying radial pressure tothe separated convolutions to size the same, and severing the sized convolutions. Y f

:7. The method of forming a side ring of a I' -tire carrying riml of the solid base type, Which consists informing a coiled strip having a section substantially of the side4 ring and a length to produce afplurality of side rings, applying radial pressure to successive convo- :iutions of the coiled strip to size the same, sev- 1 eriiig the sized convolutions, and subsequentrly ashioning the severed` convolutons.

In testimony whereof I aiiiX my signature.

WILLIAM N. BOOTH. 

